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SciPost Physics, 2018 We present a systematic treatment of perfect fluids with translation and rotation symmetry, which is also applicable in the absence of any type of boost symmetry.
Jan de Boer, Jelle Hartong, Niels A. Obers, Watse Sybesma, Stefan Vandoren
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Quantum cosmological perfect fluid models [PDF]
General Relativity and Gravitation, 2001 Perfect fluid Friedmann-Robertson-Walker quantum cosmological models for an arbitrary barotropic equation of state $p = \alpha\rho$ are constructed using Schutz's variational formalism. In this approach the notion of time can be recovered.
A. G. Riess +22 more
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Thermodynamical stability for a perfect fluid [PDF]
European Physical Journal C: Particles and Fields, 2017 According to the maximum entropy principle, it has been proved that the gravitational field equations could be derived by the extrema of the total entropy for a perfect fluid, which implies that thermodynamic relations contain information as regards ...
Xiongjun Fang, Xiaokai He, Jiliang Jing
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Quantum Perfect-Fluid Kaluza-Klein Cosmology [PDF]
International Journal of Modern Physics A, 2007 The perfect fluid cosmology in the 1+d+D dimensional Kaluza-Klein spacetimes for an arbitrary barotropic equation of state $p= n \rho$ is quantized by using the Schutz's variational formalism.
Alvarenga F. G. +9 more
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Spinor model of a perfect fluid
Open Physics, 2010 Different characteristic of matter influencing the evolution of the Universe has been simulated by means of a nonlinear spinor field. We have considered two cases where the spinor field nonlinearity occurs either as a result of self-action or due to the ...
Saha Bijan
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Cosmological perfect-fluids in f(R) gravity [PDF]
International Journal of Geometric Methods in Modern Physics, 2018 We show that an n-dimensional generalized Robertson-Walker (GRW) space-time with divergence-free conformal curvature tensor exhibits a perfect fluid stress-energy tensor for any f(R) gravity model.
Capozziello, Salvatore +2 more
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The quantum perfect fluid in 2D
SciPost PhysicsWe consider the field theory that defines a perfect incompressible 2D fluid. One distinctive property of this system is that the quadratic action for fluctuations around the ground state features neither mass nor gradient term.
Aurélien Dersy, Andrei Khmelnitsky, Riccardo Rattazzi
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Geometric perfect fluids from Extended Gravity [PDF]
Europhysics Letters, 2022 Abstract A main issue in cosmology and astrophysics is whether the dark sector phenomenology originates from particle physics, then requiring the detection of new fundamental components, or it can be addressed by modifying General Relativity.
Capozziello, Salvatore +2 more
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Spacetimes Admitting Concircular Curvature Tensor in f(R) Gravity
Frontiers in Physics, 2022 The main object of this paper is to investigate spacetimes admitting concircular curvature tensor in f(R) gravity theory. At first, concircularly flat and concircularly flat perfect fluid spacetimes in fR gravity are studied.
Uday Chand De +5 more
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Thermodynamical analysis of charged rotating black hole surrounded by perfect fluid dark matter
Nuclear Physics B, 2023 This paper is devoted to studying thermodynamics and particle acceleration around charged rotating BHs surrounded by perfect fluid dark matter. In the beginning, we discuss BH horizons, ergosphere and inner stable circular orbits in the framework of ...
Gulzoda Rakhimova +4 more
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